题目内容
用你喜欢的方法计算.
35÷(
÷
)
+24×(
-
)
(
+
-
)÷
.
35÷(
| 6 |
| 5 |
| 3 |
| 7 |
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
(
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 12 |
分析:(1)先算括号内的,再算括号外的;
(2)24×(
-
)运用乘法分配律简算,然后再算加法;
(3)把除法改为乘法,运用乘法分配律简算.
(2)24×(
| 7 |
| 8 |
| 5 |
| 6 |
(3)把除法改为乘法,运用乘法分配律简算.
解答:解:(1)35÷(
÷
),
=35÷(
×
),
=35÷
,
=35;
(2)
+24×(
-
),
=
+24×
-24×
,
=
+21-20,
=1
;
(3)(
+
-
)÷
,
=(
+
-
)×12,
=
×12+
×12-
×12,
=3+10-4,
=9.
| 6 |
| 5 |
| 3 |
| 7 |
=35÷(
| 6 |
| 5 |
| 7 |
| 3 |
=35÷
| 14 |
| 5 |
=35;
(2)
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
=
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
=
| 2 |
| 3 |
=1
| 2 |
| 3 |
(3)(
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 12 |
=(
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
=
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
=3+10-4,
=9.
点评:此题考查了分数的四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
练习册系列答案
相关题目